Post on 25-Jun-2020
Knowledge Management for Web 2.0
Prof. Dr. Iryna Gurevych
Dr. Delphine Bernhard, Johannes Hoffart, Torsten Zesch
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 1
1.
2.
Introduction to the topic
Related projects at UKP Lab
Outline
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 2
3. Presentation of seminar topics
Obligatory Reading
What Is Web 2.0
Design Patterns and Business
Models for the Next Generation of
Software
by Tim O'Reilly
09/30/2005
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 3
What happened in Fall 2001?
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 4
Popularity of Web 2.0
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 5
Web 1.0 versus Web 2.0
Web 1.0 ! Web 2.0
DoubleClick --> Google AdSense
mp3.com --> Napster
Britannica Online --> Wikipedia
personal websites --> blogging
domain name speculation --> search engine optimization
page views --> cost per click
screen scraping --> web services
publishing --> participation
content management systems --> wikis
directories (taxonomy) --> tagging („folksonomy“)
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 6
05/05/08 | Computer Science Department | Ubiquitous Knowledge Processing Lab | 7/76
Central Principle of Web 2.0
Harnessing Collective Intelligence
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 8
Harnessing Collective Intelligence
!!Hyperlinking
!!Yahoo!
!!eBay
!!Amazon
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 9
Hyperlinking
!!Foundation of the web
!!Users add new content, and new sites
!!Bound in to the structure of the web by other users
discovering the content and linking to it
!!Much as synapses form in the brain, with
associations becoming stronger through repetition or
intensity, the web of connections grows organically as
an output of the collective activity of all web users
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 10
Yahoo!
!!The first great internet success story
!!Born as a catalog, or directory of links, an
aggregation of the best work of thousands, then
millions of web users
!!Moved into the business of creating many types of
content
!!A portal to the collective work of the net's users
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 11
!!Breakthrough in search
!!Undisputed search market leader
!!PageRank, a method of using the link structure of
the web rather than just the characteristics of
documents to provide better search results
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 12
eBay
!!eBay's product is the collective activity of users
!!Grows organically in response to user activity
!!The company's role is as an enabler of a context in
which that user activity can happen
!!Competitive advantage from the critical mass of
buyers and sellers, which makes any new entrant
offering similar services significantly less attractive
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 13
Amazon
!!The same products as competitors such as
Barnesandnoble.com
!!A science of user engagement
!!More user reviews, invitations to participate in varied
ways on virtually every page – and even more
importantly, they use user activity to produce better
search results
!!Always leads with "most popular", a real-time
computation based not only on sales but other factors
that Amazon insiders call the "flow" around products
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 14
Further Web 2.0 Innovations
!!Wikipedia
!!del.icio.us
!!Flickr
!!Collaborative spam filtering
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 15
Wikipedia
!!An online encyclopedia
!!An entry can be added and edited by any web user
!!A radical experiment in trust
!!Eric Raymond's dictum (originally coined in the
context of open source software) that “with enough
eyeballs, all bugs are shallow”
!!Among the top ten web sites 4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 16
Competencies of Web 2.0 Companies
•!Services, not packaged software
•!Control over unique, hard-to-recreate data sources
that get richer as more people use them
•!Trusting users as co-developers
•!Harnessing collective intelligence
•!Leveraging the long tail through customer self-
service
•!Software above the level of a single device
•!Lightweight user interfaces, development models,
AND business models
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 17
1.
2.
Introduction to the topic
Related projects at UKP Lab
Outline
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 18
3. Presentation of seminar topics
Related Projects at UKP Lab
!!Semantic Information Retrieval using Wikipedia, Wiktionary
!!Question Answering for E-Learning based on Social
Question & Answer plattforms
!!Wikulu – Self-organizing Wikis
!!Theseus-TEXO: Knowledge-based Infrastructures for
Internet of the Future (Web Services, Community Mining)
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 19
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 20
Web 2.0 as Knowledge Resource
for Natural Language Processing
NLP applications
!!???
NLP applications
!!Semantic Relatedness !! (Zesch et al., 2008)
NLP applications
!!Information Extraction !! (Ruiz-Casado et al., 2005)
!!Information Retrieval !! (Gurevych et al., 2007)
!!Named Entity Recognition !! (Bunescu & Pasca, 2006)
!!Question Answering !! (Ahn et al., 2004)
!!Text Categorization !! (Gabrilovich & Markovitch, 2006)
Wiktionary – Wikipedia‘s lexical companion
!!Language
!!Etymology
!!Pronunciation
!!Part-of-speech
!!Word senses
!!Synonyms
!!Derived Terms
!!Translations
!!Abbreviations, Antonyms,
Categories, Collocations,
Examples, Glosses,
Hypernyms, Hyponyms,
Morphology, Quotations,
Related terms, Troponyms 4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 21
Semantisches Information Retrieval
8.10.2008 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 22
Suche:
Dienstreise
….
… Geschäftsreise
…
Gesuchtes Dokument:
Mining Wikipedia Revision History for
Paraphrase Recognition
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 23
Automatic Question Answering for eLearning
8.10.2008 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 24
Answer Retrieval and Summarization
8.10.2008 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 25
What are
Internet
Browsers
Ranked list of answers: 1.!A web browser is a software
application which … 2.!A web browser is a graphical
interface that … 3.!The most common web browsers are Firefox, Netscape,
IE, Safari, …
Opinion-Oriented Search in Social Q&A Plattforms
8.10.2008 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 26
Wikis for Knowledge Management
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 27
•! Small
•! Well structured
•! Easy to find and add content
In the beginning ...
People like
it and add
lots of content
I can‘t find
anything!
Where do
I put this?
?
How can we solve these
problems?
Use Natural Language Processing to
support the user with his tasks:
!!Searching Information
!!Semantic Information Retrieval
!!Question Answering
!!Browsing
!!Keyphrase Extraction and
Summarization
!!Topic Detection
!!Adding content
!!Suggest similar pages where to add
the content
!!Suggest links pointing to and
originating from a new page
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 28
How Wikulu might look like
4/20/09 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 29
„Wikulu“ - Hawaiian for organize [‚kukulu‘] fast [‚wiki‘]